package cn.com.pureAppApi.interceptor;

import java.net.InetAddress;

import javax.servlet.http.HttpServletRequest;


/**
 * QQ讨论群:76989293
 * @email 2696701142@qq.com
 * @date 2018-06-12 16:51:48
 *
 */
public class ClientHostUtil {
	public static String getIpAddress(HttpServletRequest request) {
		try {
			String ipAddress = request.getHeader("x-forwarded-for");
			if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
				ipAddress = request.getHeader("Proxy-Client-IP");
			}
			if (ipAddress == null || ipAddress.length() == 0 || "unknow".equalsIgnoreCase(ipAddress)) {
				ipAddress = request.getHeader("WL-Proxy-Client-IP");
			}
			if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
				ipAddress = request.getRemoteAddr();
				if (ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")) {
					// 根据网卡获取本机配置的IP地址
					InetAddress inetAddress = InetAddress.getLocalHost();
					ipAddress = inetAddress.getHostAddress();
				}
			}
			// 对于通过多个代理的情况，第一个IP为客户端真实的IP地址，多个IP按照','分割
			if (null != ipAddress && ipAddress.length() > 15) {
				// "***.***.***.***".length() = 15
				if (ipAddress.indexOf(",") > 0) {
					ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
				}
			}
			return ipAddress;
		} catch (Exception e) {
		}
		return null;
	}
}
